18691900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 42872256

約数和(自身を除く): 24180356

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 47, 50, 82, 94, 97, 100, 164, 188, 194, 205, 235, 388, 410, 470, 485, 820, 940, 970, 1025, 1175, 1927, 1940, 2050, 2350, 2425, 3854, 3977, 4100, 4559, 4700, 4850, 7708, 7954, 9118, 9635, 9700, 15908, 18236, 19270, 19885, 22795, 38540, 39770, 45590, 48175, 79540, 91180, 96350, 99425, 113975, 186919, 192700, 198850, 227950, 373838, 397700, 455900, 747676, 934595, 1869190, 3738380, 4672975, 9345950, 18691900]

約数ペア:

[(1, 18691900), (2, 9345950), (4, 4672975), (5, 3738380), (10, 1869190), (20, 934595), (25, 747676), (41, 455900), (47, 397700), (50, 373838), (82, 227950), (94, 198850), (97, 192700), (100, 186919), (164, 113975), (188, 99425), (194, 96350), (205, 91180), (235, 79540), (388, 48175), (410, 45590), (470, 39770), (485, 38540), (820, 22795), (940, 19885), (970, 19270), (1025, 18236), (1175, 15908), (1927, 9700), (1940, 9635), (2050, 9118), (2350, 7954), (2425, 7708), (3854, 4850), (3977, 4700), (4100, 4559)]